Please report it

Hi,
I like the pluggin, but now, and for the first time, I have a problem with it. I use the multi set feature, but today all the multi set have dissapear. So I try to make them again, but when I do a warning message appears: There is something wrong inserting the name of the Multi Set, please report it. So… that’s what I am doing now, i’m reporting it and I also want to know how can I solve it because I use it a lot in my web.

Thanks and if there is another place where I should report the error please tell me.

https://wordpress.org/plugins/yet-another-stars-rating/